Auswahl der wissenschaftlichen Literatur zum Thema „Drill-mill machine“

A method to calculate tool path uniquely for roughing using a flat drill is proposed. A flat drill is a drill with a flat tip. Unlike a square end mill, it cannot feed a tool laterally, but it is suitable for machining to feed a tool longitudinally. The advantage offered by the flat drill is expected to reduce machining troubles, such as tool breakages and chatter vibration, owing to the axial sturdiness of the tool. Furthermore, it can be used to machine lapped holes that cannot be machined with a normal drill owing to its flat tip. Hence, roughing using a flat drill by drilling multiple holes at constant intervals is proposed herein. Furthermore, in this method, a tool path for semi-finishing is generated only on the remaining region. A cutting experiment is conducted to validate the effectiveness of the proposed method. The result of the cutting experiment confirmed the effectiveness of the proposed method based on the machining time and the productivity of machining multiple products simultaneously.

Apply the function of FBM Mill and FBM Drill built in MasterCam to achieve the automatic NC programming and machining of solid parts.The feature modeling of parts is produced in Solidworks, and then converted to MasterCam. After the stock size of parts and FBM parameters are set, the features of parts are recognized automatically; and all of the 2D toolpaths of parts are automatically generated in a specified machine. Finally, the automatically generated NC toolpaths based on features are verified by simulating. FBM technology is adopted to eliminate the manual processes involved in identifying features for programming milling and drilling operations on solid parts, thus greatly increasing the efficiency and flexibility of programming, which is an effective method of achieving automatic NC programming.

Industrial robots are used for many tasks, mainly for material handling, welding and cutting. Robots can be also equipped with other tools for example drill or mill cutter and used for machining. Compared to conventional machines, robots have some advantages, which are: large range, flexibility and speed. On the other hand the greater disadvantage is small stiffness of robotic arms. Also the precision of robot positioning is smaller than modern CNC machines. Nowadays small number of robots are used mainly for machining of soft materials, such as plastic, wood, foam and aluminium. We have also executed some experiments with robot machining including styrodur milling. This technique is similar to rapid prototyping technics. Obtained parts can be used as prototypes. Robots can be used also for machining of hard materials and steel, but that is related with greater cutting force. Thanks they flexibility robots can be used for tasks that are performed by hand by locksmiths. An example of deburring and chamfering of sharp edges were analysed. The burrs and sharp edges that remains after some machining operations must be removed. In most cases that is done by chamfering the edges with hand tools. That tasks requires skilled workers and is physically exhausting and therefore industrial robots can be used to perform that work. But the first problem is prediction of cutting force and selection of proper robot with adequate payload. A mechanistic model of cutting force during milling a chamfer on the edge is presented in the article. Obtained results are similar with other experimental results that are described in the analysed bibliography. Afterwards a methodology for robot selection is explained. Because robot manufacturers give only data for static payload of robot arm, there must be a way to take into account the dynamic cutting force. Some problems that are possible during robot machining are discussed, and some solution are proposed. Because milling force is not constant and still subsequently changes value and direction, it can be the source of vibration. Small stiffness of robot arm combined with vibrations can caused losing of robot position and improper surface after machining. Other problem can be robot programming for machining of curved surfaces in 3 dimensional space. There are same CAM system that can be used for that purpose. Results obtained with developed model can be used for design of robotic cell for chamfering and milling. Normal 0 21 false false false PL X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:Standardowy; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";}

The project aims at effect of cutting forces on the drill & end mill cutter tools in modern manufacturing. For High-speed machining operation, accuracy of tool tip places a vital role in mass manufacturing. In order to get high precision, high-efficiency automated production the tool life should be longer enough to withstand various stresses acting on it. The main aim is to develop the combination of optimum cutting parameters by using taguchi method. In this project design of experiment has been employed with L9 (3^3) Orthogonal Array for three parameters namely Speed, Feed and Depth of cut. For each of these parameters three different levels have been identified and used to perform the cutting parameters for minimizing the stresses acting on various tool in SINEWAVE© VMM-A-200 CNC Milling Machine. The material selected for machining was Aluminium plate with drill & end drill cutter tools. Cutting forces are experimentally determined at a tip of cutting tools during machining by milling tool dynamometer. From the obtained cutting forces are applied on tip of cutting tools and results are evaluated using ANSYS software such as various stresses, strain and total deformation are found. Cutting Tools are modelled in CREO software and the model is then imported in ANSYS software for analysis. Also, from stress analysis of milling tool it is evident thrust force play a vital role in machining, whenever the stress is minimum then the tool life become maximum.

This diploma thesis deals with rebuild of manual drill-mill machine BF20L into CNC mill machine, 3D model of that and eventual control using PLC. All axes are powered by stepper motors, with encoders, connected to control cards and industrial computer from company Beckhoff. For this control is made full switchboard, supplemented by electrical wiring diagram. Program control along with visualization is made in software TwinCAT 3. Drill-mill machine can be controlled manually or automatically by program.